Fenwal 35-705505-115 Control
The Fenwal 35-705505-115 is a high-performance 120V Direct Spark Ignition (DSI) control engineered for precision timing and robust flame monitoring in gas-fired heating systems. This microprocessor-based ignition module is a reliable solution for furnaces, boilers, and commercial water heaters, featuring a 15-second pre-purge cycle to clear residual combustion gases and a 10-second trial for ignition (TFI) to ensure safe burner start-up. With 3 trials for ignition before entering lockout mode, this control optimizes system uptime in demanding residential and industrial environments.
Designed for versatile integration, the Fenwal 35-70 series supports natural, manufactured, and LP gas applications. The unit includes on-board diagnostics with a dedicated LED output, allowing technicians to quickly identify fault codes like ignition lockout or flame signal loss without complex external meters. Its internal flame sensing circuit requires a minimum signal of 1.0 microamp, and the flame current test pins provide instant access for verifying signal strength during routine maintenance. The polarity-insensitive design further reduces the risk of nuisance lockouts due to field wiring errors, making it a preferred OEM replacement ignition board for contractors.
Key Benefits for HVACR Technicians:- Advanced Diagnostics: Simplifies troubleshooting with LED fault codes for rapid identification of system errors.
- Sequential Logic: Integrated 15s pre-purge and 10s TFI sequences managed by a sophisticated microprocessor for repeatable performance.
- Multi-Try Reliability: Features 3 ignition attempts with inter-purge to maximize successful burner ignition before safety lockout.
- Flexible Mounting: Non-position sensitive construction allows for horizontal or vertical installation in tight equipment cabinets.
- Broad Compatibility: Fully compatible with 120 VAC gas-fired equipment using local or remote flame sensing configurations.
How do I reset the Fenwal 35-705505-115 after a lockout?
The module can be reset by cycling the thermostat or removing the 120 VAC power supply for at least 5 seconds. Some configurations also feature a 1-hour automatic reset if the call for heat remains active.
What is the purpose of the 15-second pre-purge?
The pre-purge period allows the combustion blower to clear any unburned gas from the combustion chamber before the spark is energized, ensuring a safer ignition cycle and preventing delayed ignition "booms."
Does this control require a specific polarity for the 120V input?
While proper wiring is always recommended, the Fenwal 35-705505-115 is designed to be polarity insensitive regarding the flame signal, which significantly reduces nuisance trips caused by reversed line and neutral wires.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $272.72
-65%$272.72
$95.45Fenwal 35-705505-115 Control
The Fenwal 35-705505-115 is a high-performance 120V Direct Spark Ignition (DSI) control engineered for precision timing and robust flame monitoring in gas-fired heating systems. This microprocessor-based ignition module is a reliable solution for furnaces, boilers, and commercial water heaters, featuring a 15-second pre-purge cycle to clear residual combustion gases and a 10-second trial for ignition (TFI) to ensure safe burner start-up. With 3 trials for ignition before entering lockout mode, this control optimizes system uptime in demanding residential and industrial environments.
Designed for versatile integration, the Fenwal 35-70 series supports natural, manufactured, and LP gas applications. The unit includes on-board diagnostics with a dedicated LED output, allowing technicians to quickly identify fault codes like ignition lockout or flame signal loss without complex external meters. Its internal flame sensing circuit requires a minimum signal of 1.0 microamp, and the flame current test pins provide instant access for verifying signal strength during routine maintenance. The polarity-insensitive design further reduces the risk of nuisance lockouts due to field wiring errors, making it a preferred OEM replacement ignition board for contractors.
Key Benefits for HVACR Technicians:- Advanced Diagnostics: Simplifies troubleshooting with LED fault codes for rapid identification of system errors.
- Sequential Logic: Integrated 15s pre-purge and 10s TFI sequences managed by a sophisticated microprocessor for repeatable performance.
- Multi-Try Reliability: Features 3 ignition attempts with inter-purge to maximize successful burner ignition before safety lockout.
- Flexible Mounting: Non-position sensitive construction allows for horizontal or vertical installation in tight equipment cabinets.
- Broad Compatibility: Fully compatible with 120 VAC gas-fired equipment using local or remote flame sensing configurations.
How do I reset the Fenwal 35-705505-115 after a lockout?
The module can be reset by cycling the thermostat or removing the 120 VAC power supply for at least 5 seconds. Some configurations also feature a 1-hour automatic reset if the call for heat remains active.
What is the purpose of the 15-second pre-purge?
The pre-purge period allows the combustion blower to clear any unburned gas from the combustion chamber before the spark is energized, ensuring a safer ignition cycle and preventing delayed ignition "booms."
Does this control require a specific polarity for the 120V input?
While proper wiring is always recommended, the Fenwal 35-705505-115 is designed to be polarity insensitive regarding the flame signal, which significantly reduces nuisance trips caused by reversed line and neutral wires.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Description
The Fenwal 35-705505-115 is a high-performance 120V Direct Spark Ignition (DSI) control engineered for precision timing and robust flame monitoring in gas-fired heating systems. This microprocessor-based ignition module is a reliable solution for furnaces, boilers, and commercial water heaters, featuring a 15-second pre-purge cycle to clear residual combustion gases and a 10-second trial for ignition (TFI) to ensure safe burner start-up. With 3 trials for ignition before entering lockout mode, this control optimizes system uptime in demanding residential and industrial environments.
Designed for versatile integration, the Fenwal 35-70 series supports natural, manufactured, and LP gas applications. The unit includes on-board diagnostics with a dedicated LED output, allowing technicians to quickly identify fault codes like ignition lockout or flame signal loss without complex external meters. Its internal flame sensing circuit requires a minimum signal of 1.0 microamp, and the flame current test pins provide instant access for verifying signal strength during routine maintenance. The polarity-insensitive design further reduces the risk of nuisance lockouts due to field wiring errors, making it a preferred OEM replacement ignition board for contractors.
Key Benefits for HVACR Technicians:- Advanced Diagnostics: Simplifies troubleshooting with LED fault codes for rapid identification of system errors.
- Sequential Logic: Integrated 15s pre-purge and 10s TFI sequences managed by a sophisticated microprocessor for repeatable performance.
- Multi-Try Reliability: Features 3 ignition attempts with inter-purge to maximize successful burner ignition before safety lockout.
- Flexible Mounting: Non-position sensitive construction allows for horizontal or vertical installation in tight equipment cabinets.
- Broad Compatibility: Fully compatible with 120 VAC gas-fired equipment using local or remote flame sensing configurations.
How do I reset the Fenwal 35-705505-115 after a lockout?
The module can be reset by cycling the thermostat or removing the 120 VAC power supply for at least 5 seconds. Some configurations also feature a 1-hour automatic reset if the call for heat remains active.
What is the purpose of the 15-second pre-purge?
The pre-purge period allows the combustion blower to clear any unburned gas from the combustion chamber before the spark is energized, ensuring a safer ignition cycle and preventing delayed ignition "booms."
Does this control require a specific polarity for the 120V input?
While proper wiring is always recommended, the Fenwal 35-705505-115 is designed to be polarity insensitive regarding the flame signal, which significantly reduces nuisance trips caused by reversed line and neutral wires.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
